Question 174 · LDEK · Extraoral appliances
Which of the following statements about the treatment with the face mask are false?
1) the face mask is an extraoral appliance used for maxillary protraction;
2) the best results are obtained when all permanent teeth are fully erupted;
3) maxillary deficiency is an indication for treatment;
4) the facemask is worn from 6 to 8 hours per day;
5) elastics can be attached to the fixed appliance.
The correct answer is:
2) the best results are obtained when all permanent teeth are fully erupted;
3) maxillary deficiency is an indication for treatment;
4) the facemask is worn from 6 to 8 hours per day;
5) elastics can be attached to the fixed appliance.
The correct answer is:
- A. 2,4.
- B. 3,4.
- C. 3,5.
- D. 4,5.
- E. 1,5.
Hint
Consider the optimal age window for maxillary protraction and the daily wear time needed for an orthopaedic effect.
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